Traditional DSLR systems still make up the top five in the list, though, with the Nikon D3100 entry-level model at the top, closely followed by the Canon EOS Kiss X5 (or the 600D to use its European name).

This is the first time that the majority of the cameras in the top 20 list have been mirrorless systems, which is a telling indicator of the format's growing popularity.

Nikon and Canon have yet to enter the compact system camera market, but rumours are circulating about imminent announcements from both companies.

It's harder to assess the popularity of cameras in other countries such as the UK, since detailed reports are not made available.

Taking a quick peek at the best-selling cameras on Amazon, however, puts the Panasonic Lumix FS35 compact camera at the top of the list, with the first system camera, the Nikon D3000, not appearing until no.5.